42161473 has 2 divisors, whose sum is σ = 42161474. Its totient is φ = 42161472.

The previous prime is 42161453. The next prime is 42161477. The reversal of 42161473 is 37416124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37112464 + 5049009 = 6092^2 + 2247^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42161473 is a prime.

It is not a weakly prime, because it can be changed into another prime (42161477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21080736 + 21080737.

It is an arithmetic number, because the mean of its divisors is an integer number (21080737).

Almost surely, 2^42161473 is an apocalyptic number.

It is an amenable number.

42161473 is a deficient number, since it is larger than the sum of its proper divisors (1).

42161473 is an equidigital number, since it uses as much as digits as its factorization.

42161473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032, while the sum is 28.

The square root of 42161473 is about 6493.1866598766. The cubic root of 42161473 is about 348.0475586783.

Adding to 42161473 its reverse (37416124), we get a palindrome (79577597).

The spelling of 42161473 in words is "forty-two million, one hundred sixty-one thousand, four hundred seventy-three".